\begin{table}[!h]
\begin{center}
\begin{tabular}{lcccccccc}
& \multicolumn{2}{c}{R1-R2} & \multicolumn{2}{c}{R1-R3} & \multicolumn{2}{c}{R2-R3} & \multicolumn{2}{c}{Media} \\ \hline
Cat. & Cons.(\%) & Kappa & Cons.(\%) & Kappa & Cons.(\%) & Kappa & Cons.(\%) & Kappa   \\
\hline
1 & 93.94 & 0.86 & 88.55 & 0.76 & 87.30 & 0.74 & 89.73 & 0.79  \\
2 & 87.30 & 0.66 & 80.57 & 0.48 & 78.97 & 0.46 & 82.28 & 0.53  \\
3 & 91.26 & 0.57 & 88.62 & 0.45 & 88.48 & 0.46 & 89.45 & 0.49  \\
4 & 97.43 & 0.36 & 96.60 & 0.51 & 96.81 & 0.29 & 96.95 & 0.39  \\
\end{tabular}
\caption{Resultados de concordancia interobservador por categor\'ias (BI-RADS) para toda la base de datos}
\end{center}
\end{table}
